BLH: Asbestos Litigation History and Pipe Insulation Products

Company History

BLH operated as a manufacturer in the United States during a period when asbestos was a widely used industrial material, particularly in thermal insulation applications for piping systems. While the precise founding date of BLH has not been definitively established in publicly available records, the company was active during the decades when asbestos-containing pipe insulation was standard across American industrial, commercial, and construction jobsites.

The mid-twentieth century represented the height of asbestos use in American industry. Pipe insulation manufacturers of this era routinely incorporated chrysotile, amosite, and other asbestos fiber types into their product lines, as asbestos offered superior heat resistance, durability, and fire-retardant properties at a low cost. Regulatory pressure from the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) — along with growing awareness of asbestos-related disease — led most manufacturers to phase out asbestos content by the early 1980s. According to asbestos litigation records, BLH followed a similar trajectory, with documented asbestos use ceasing at approximately that time.

Workers and families researching historical asbestos exposure associated with BLH products will find that the company appears in the civil litigation record primarily in connection with pipe insulation products supplied to a range of American jobsites during the 1940s through the early 1980s.

Asbestos-Containing Products

According to asbestos litigation records, BLH manufactured pipe insulation products that plaintiffs alleged contained asbestos as a functional component. Pipe insulation was one of the most common vehicle for occupational asbestos exposure during the mid-twentieth century. These products were designed to wrap around steam lines, hot water pipes, process piping, and other high-temperature systems found in industrial plants, power generating stations, shipyards, refineries, and commercial construction projects.

Court filings document that workers at numerous jobsites came into contact with pipe insulation products attributed to BLH during installation, maintenance, and removal activities. Asbestos-containing pipe insulation — regardless of manufacturer — typically consisted of molded pipe sections and wrap materials that could contain asbestos fiber concentrations sufficient to release respirable fibers when cut, sawed, broken, or disturbed during routine trade work.

While specific product names, model designations, or formulation records for BLH pipe insulation have not been independently catalogued in publicly available regulatory databases at the time of this writing, plaintiffs alleged in civil litigation that BLH products present on jobsites during the covered period contained asbestos. Attorneys and researchers seeking product-specific documentation are encouraged to consult court filings from relevant asbestos litigation matters and to work with occupational exposure historians or industrial hygienists who specialize in this period.

Occupational Exposure

The workers most likely to have encountered BLH pipe insulation products on American jobsites include, but are not limited to:

  • Pipefitters and steamfitters who installed, maintained, and repaired insulated piping systems in industrial facilities and power plants
  • Insulators (asbestos workers) who applied, cut, and fitted pipe covering as their primary trade
  • Plumbers working on steam and hot water systems in commercial and residential construction
  • Boilermakers who worked in proximity to insulated piping connected to boilers and pressure vessels
  • Maintenance workers and millwrights employed in manufacturing plants, refineries, and chemical processing facilities where insulated pipe systems required ongoing service
  • Shipyard workers who installed and repaired pipe insulation aboard naval and commercial vessels during construction and overhaul
  • Construction laborers and helpers who worked alongside insulation tradesmen and were exposed to airborne fiber during nearby cutting and fitting operations
  • Demolition and renovation workers who disturbed legacy pipe insulation during building rehab or teardown projects

Plaintiffs alleged in asbestos litigation that exposure to BLH pipe insulation occurred at fixed industrial facilities as well as on construction sites where multiple contractors worked in shared spaces. This is significant because bystander exposure — the inhalation of asbestos fibers released by the work of others in the same area — is a well-documented pathway to asbestos-related disease.

The latency period for asbestos-related diseases is a critical factor in exposure research. Mesothelioma, asbestosis, and asbestos-related lung cancer typically do not manifest until 20 to 50 years after initial exposure. This means that workers who handled BLH pipe insulation products during the 1950s, 1960s, and 1970s may only now be receiving diagnoses. Family members of tradesmen — particularly spouses and children who laundered work clothing — may also have been exposed to fibers brought home on work clothes, a pathway known as secondary or take-home exposure.

Regulatory context is also relevant to understanding this exposure history. OSHA first established permissible exposure limits for asbestos in 1971, and the agency tightened those limits in subsequent years as evidence of harm accumulated. AHERA (the Asbestos Hazard Emergency Response Act of 1986) further addressed asbestos in schools and public buildings. For workers on industrial jobsites, however, meaningful protective measures were often absent or inconsistently enforced through the period when BLH products were in active use.

BLH is classified under Tier 2 for purposes of this reference site, meaning the company has been named in asbestos litigation but has not, to the knowledge of this publication’s editorial record, established a Section 524(g) asbestos bankruptcy trust fund. This distinction is important for workers and families considering their legal options.

No asbestos bankruptcy trust fund associated with BLH has been identified. This means that any compensation claims arising from exposure to BLH products would need to be pursued through the civil tort system rather than through a trust fund claims process.

According to asbestos litigation records, BLH has appeared as a defendant in civil asbestos cases filed in various jurisdictions. Court filings document allegations that the company placed asbestos-containing pipe insulation into commerce without adequate warning to end users about the health hazards associated with asbestos fiber inhalation. Plaintiffs alleged that BLH knew or should have known of the dangers associated with asbestos during the period of product manufacture and distribution. These are allegations made in litigation; no finding of liability against BLH is stated or implied by this article.

Workers and families who believe they were exposed to BLH pipe insulation should consult with an attorney experienced in asbestos litigation. Because no trust fund claim process exists for BLH at this time, the civil litigation pathway involves filing suit within the applicable statute of limitations for the jurisdiction where exposure occurred or where the plaintiff resides. Statute of limitations periods vary and typically begin running from the date of diagnosis of an asbestos-related disease, not the date of exposure — a legal doctrine known as the discovery rule that is widely applied in asbestos cases.

Attorneys handling BLH-related claims will typically investigate:

  • Employment and jobsite history to establish presence of BLH products
  • Co-defendant exposure to other manufacturers whose trust funds may be available for claim
  • Medical records and pathology reports confirming an asbestos-related diagnosis
  • Witness testimony from co-workers or union records documenting product identification on specific jobsites

Summary for Workers and Families

If you or a family member worked with or near pipe insulation on American industrial, shipyard, power plant, or construction jobsites between the 1940s and early 1980s, BLH is among the manufacturers that may be relevant to your exposure history. According to asbestos litigation records, BLH manufactured pipe insulation products that plaintiffs alleged contained asbestos during this period.

BLH does not have a known asbestos bankruptcy trust fund. Compensation claims connected to BLH products must currently be pursued through civil litigation. Because many other manufacturers of asbestos-containing pipe insulation did establish trust funds — including some whose products were used on the same jobsites as BLH products — an asbestos attorney can evaluate whether trust fund claims against other defendants may be available alongside or instead of civil litigation.

If you have been diagnosed with mesothelioma, asbestosis, asbestos-related lung cancer, or another asbestos-related disease, documenting your full work history — including every employer, jobsite, and product you recall encountering — is an essential first step. Legal consultations with asbestos litigation firms are typically provided at no charge and on a contingency basis, meaning no fees are owed unless compensation is recovered.

This article is provided for historical and informational reference purposes. It does not constitute legal advice. Exposure histories are complex and individual; outcomes in asbestos litigation vary. Consult a qualified asbestos attorney to evaluate the specific facts of your situation.